Clay-grinding machine



(No Model.)

L. HOXSIE Kv A. PIPER.

. CLAY GRINDING MAGHINE. No. 248,042. 8 Patented 00t.-11, 1881.

WITNESSES 2 SheetsSheet i.

(no Model.) ZSheets-Sheet 2-. I

L. HOXSIE & A. PIPER;

CLAY GRINDING MACHINE.

'No. 248,042. Patented 001;. 11, 1881.

WITNESSES I I I %/W{y IJV' VEJV' TOR B flttorneys UNrTED STATES PATENT Qnrrce.

GEORGE Ii. HOXSIE AND AROHIBALD PIFER, OF BLISSFIELD, MICHIGAN.

CLAY-GRINDING MAICHDINE.

SPECIFICATION forming- To all whom it may concern:

Be it known that we, GEORGE L. Hoxsrn and ARCHIBALD PIFER, of Blissfield, in the county of -Lenawee and State of Michigan, haveinvented certain new and useful Improvements in Clay-Grinding Machines; and we do hereby declare that the following is a full, clear, and exact description of the invention, which will enable othersskilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specificatiom 'Figure 1 is a vertical sectional view. Fig. 2 is a side view. Fig. 3 is an end view. Fig. 4 is an end view, showing the slide-boxes for adjusting the crushing-rollers; and Fig. 5 is a perspective view. 7

Corresponding parts in the several figures are denoted by like letters of reference.

This invention relatesto machines forgrind' ing or pulverizin g clay to he used in the manufacture of brick, tile, &c.; and it consists in certain improvements in the construction of the same, which will be hereinafter fully described, and particularly pointed out in the claims.

In the drawings hereto annexed, A represents the frame of the machine, which is provided at the ends with bearings for two sets of crushing-rollers, B B, G O, the shafts of which are journaled in sliding boxes D, laterally adjustable upon the ends of the frame by set-screws E, in order that the distance between the rollers of each set may be increased or diminshed at will, thus enabling the machine to grind the clay to any required degree of fineness. The upper rollers, B B, are, in practice, adjusted farther apart than the lower ones, and scrapers F are located under each roller to remove any adhering clay.

The upper part of the frame is provided with bearings for two square shafts, G G, provided --.w;an spikes H, adjusted, as shown, so as to pass between each otherwhen the shafts, which we term the picker-shafts, revolve. A suit ably-constructed hopper, I, to receive the clay fed into the machine, is located on top of the frame.

The shafts B B of the uppercrushingroll- 5o ers are provided with gear-wheels'J J, engagpart of Letters "Patent No. 248,042, dated October 11, 1881.

Application filed May 4, 1881. (No model.)

ing loose or lazy pinions K K, arranged upon the end of the frame, and serving to transmit motion between the shafts of the upper and those, 0, of the lower rollers by means of pinions D, arranged upon the latter. The said pinions D being smaller than the gear-wheels J, it follows that the lower set of crushingrollers are rotated at greater speed than the upper ones, this being necessary in order to compensate for the greater distance between thelatter.

Motion is imparted to the machine from the main drive-shaft by means of a clutch, L, engaging the shaft of one of the lazy-pinions K. By disconnecting the clutch the machine may at any time be stopped. w

The picker-shafts G G are geared together by pinions M M at one of their ends. At the other end one of said shafts is provided with a pinion, N, clamped upon it by a pair of collars, O O, which are tightened by a bindingnut, P. Motion is transmitted to the pickershaft through the pinion N by a loose pinion, Q, engaging the gear-wheel of one of. the upper crushing-rollers.

In operation the clay to be ground is fed into the; hopper, when the revolving pickers serve to crush the larger lumps of clay and any stones or lime, &c., which may be found therein. It then passes down through the frame between the two sets of rollers, the lower ones of which crush it to the requisite fineness.

If any stones should be fed into the machine too large or too hard to be broken by the pickers, the spikes of the latter, when striking against such stone, will catch it and hold it between them. The driving-power'will then; through the herein-described arrangement of gear-wheels and pinions, loosen the pinion N between the clamping-collars O O uponthe picker-shaft, thus throwing the latter out of gear without danger of breaking any part of the machine.

Having thus described our invention, we claim and desire to secure by Letters Patent of the United States- 1. In a clay-grinding machine, the combination of the picker-shafts G G, the rollers B B G O, of which the upper ones are placed farther apart than the lower ones, and suitable operating mechanism, as herein described, for I In testimony that we claim the foregoing as the purpose set forth. our own we have hereto affixed our signatures 1o 2. The combination, with the picker-shafts in presence of two witnesses.

G G, geared together as described, of the pin- GEORGE L. HOXSIE. ion N, clamped upon one of said shafts by collars AROHIBALD PIFER. 0 O and a nut, P, and mechanism for trans- Witnesses: I

mitting motion to the picker-shafts through J. M. S. PORTER,

said pinion N, as and for the purpose set forth. JAMES HOLLOWAY. 

